/*
 * Copyright (C) 2015 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef CombinedFiltersAlphabet_h
#define CombinedFiltersAlphabet_h

#if ENABLE(CONTENT_EXTENSIONS)

#include "ContentExtensionsDebugging.h"
#include "Term.h"
#include <wtf/HashSet.h>
#include <wtf/Vector.h>

namespace WebCore {

namespace ContentExtensions {

class CombinedFiltersAlphabet {
public:
    const Term* interned(const Term&);
#if CONTENT_EXTENSIONS_PERFORMANCE_REPORTING
    size_t memoryUsed() const;
#endif

private:
    struct TermPointerHash {
        static unsigned hash(const Term* key) { return key->hash(); }
        static inline bool equal(const Term* a, const Term* b)
        {
            return *a == *b;
        }
        static const bool safeToCompareToEmptyOrDeleted = false;
    };

    HashSet<const Term*, TermPointerHash> m_uniqueTerms;
    Vector<std::unique_ptr<Term>> m_internedTermsStorage;
};

} // namespace ContentExtensions
} // namespace WebCore

#endif // ENABLE(CONTENT_EXTENSIONS)

#endif // CombinedFiltersAlphabet_h
